遥感干旱指数在洛川苹果干旱监测中的适用性分析
张茂,张霞,胡光成,王楠

Applicability Analysis of Remote Sensing based Drought Indices in Drought Monitoring of Apple in Luochuan
Mao Zhang,Xia Zhang,Guangcheng Hu,Nan Wang
图4 2014~2016年遥感干旱指数NDWI、VSWI、TVDI与SM变化趋势
(r为相关系数,“*”和“**”分别代表0.05和0.01的显著性水平)
Fig.4 Trends of NDWI, VSWI, TVDI and SM from 2014 to 2016